EP1373801B1 - Method and device for monitoring burners - Google Patents

Method and device for monitoring burners Download PDF

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Publication number
EP1373801B1
EP1373801B1 EP02702678A EP02702678A EP1373801B1 EP 1373801 B1 EP1373801 B1 EP 1373801B1 EP 02702678 A EP02702678 A EP 02702678A EP 02702678 A EP02702678 A EP 02702678A EP 1373801 B1 EP1373801 B1 EP 1373801B1
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EP
European Patent Office
Prior art keywords
temperature
flow
burner
boiler
boiler temperature
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
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EP02702678A
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German (de)
French (fr)
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EP1373801A1 (en
Inventor
Dieter Pfannstiel
Rainer Feldmeth
Volker Klumpp
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Siemens Schweiz AG
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Siemens Schweiz AG
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/24—Preventing development of abnormal or undesired conditions, i.e. safety arrangements
    • F23N5/242—Preventing development of abnormal or undesired conditions, i.e. safety arrangements using electronic means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N5/00—Systems for controlling combustion
    • F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/18—Measuring temperature feedwater temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/19—Measuring temperature outlet temperature water heat-exchanger
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2225/00—Measuring
    • F23N2225/08—Measuring temperature
    • F23N2225/20—Measuring temperature entrant temperature
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23N—REGULATING OR CONTROLLING COMBUSTION
    • F23N2227/00—Ignition or checking
    • F23N2227/12—Burner simulation or checking
    • F23N2227/16—Checking components, e.g. electronic

Definitions

  • the present invention relates to a method and a device for monitoring burners according to the preambles of independent claims 1 and 6.
  • a sensor such as boiler sensor, flow sensor or return sensor, which detects the temperature of the heating water in the boiler in the flow line or in the return line.
  • known methods and devices for monitoring burners have further mostly mechanical limiting devices, which detect a maximum temperature and turn off the burner when it is exceeded and lock. In this case, either the heating engineer or the operator of the heating system must determine why this operating condition has been reached, ie detect the error, then to release the lock and allow reconnection of the burner.
  • the known state of the art has the disadvantage that the previously known devices and methods for monitoring burners have safety devices that switch off and lock the burner in uncertain operating conditions, such as reaching or exceeding a maximum temperature, without making case distinctions can be.
  • postheating after a burner shutdown in spas or boilers which have a small water content and in this case would not necessarily be locked when the maximum temperature is exceeded.
  • There is also no preventive monitoring of the burner possible because only predefined and fixed operating conditions are monitored, but not the behavior of the burner before or after these operating conditions.
  • the invention is therefore based on the object to improve the known methods and devices for monitoring of burners to the effect that a dynamic monitoring of burners is made possible, which detects the operating conditions before or after reaching an unsafe operating state.
  • the inventive method for monitoring burners has an automatic burner control for controlling the burner and possibly a controller for controlling the automatic burner and a temperature monitor, wherein at least the flow / boiler temperature detected and by means of the temperature monitor with a predeterminable first maximum flow / Boiler temperature is compared and wherein the burner is turned off when the flow / boiler temperature reaches or exceeds the predeterminable first maximum flow / boiler temperature.
  • the inventive method is characterized in that the flow / boiler temperature is compared with a predeterminable second maximum flow / boiler temperature, wherein the predeterminable second maximum flow / boiler temperature is higher than the predeterminable first maximum flow / boiler temperature, and that Burner is then shut down and locked when the flow / boiler temperature reaches or exceeds the predeterminable second maximum flow / boiler temperature and additionally an error signal of the temperature monitor is generated when the flow / boiler temperature reaches or exceeds the predeterminable first maximum flow temperature and a status signal the temperature monitor does not signalise burner shutdown or there is no status signal from the temperature monitor. In this case, it is a failure of the temperature monitor, i. there was no shutdown of the burner, although the first maximum flow / boiler temperature has been reached or exceeded.
  • the error signal of the temperature monitor is also generated when the flow / boiler temperature, the predeterminable first maximum flow / boiler temperature reaches or exceeds and a burner valve signal signals an open burner valve or no burner valve signal is present.
  • the first maximum flow / boiler temperature has been exceeded without the fuel supply to the burner has been interrupted. Also in this case, the error signal is generated, which leads to the shutdown and locking of the burner.
  • the burner is not locked when the second maximum supply / boiler temperature is exceeded, but the temperature monitor "logs" a regular burner shutdown.
  • This regular burner shutdown occurs when the first maximum supply / boiler temperature has been reached or exceeded and the temperature monitor signals a status signal that confirms sending an "OFF" signal to the burner control and if a burner valve signal is closing or closing of the fuel valve signals.
  • reheating Such reaching the second maximum flow / boiler temperature when the burner is switched off is called reheating.
  • This reheating is initially not a critical operating condition, as this is caused by any control errors, but by unfavorable operating conditions or operating conditions.
  • a special counter for reheating is counted up if the second maximum flow / boiler temperature would be reached by reheating.
  • the error signal of the temperature monitor is generated when the flow / boiler temperature reaches or exceeds the predeterminable second maximum flow / boiler temperature more than a pre-definable number of times, without the burner being locked.
  • the error signal of the temperature monitor is not generated when the flow / boiler temperature is the predeterminable second maximum flow / boiler temperature does not reach or exceed the predetermined number of times within a predeterminable time without the burner being locked. Therefore, if this maximum limit of the counter (for example, ten times a day) is not exceeded, the counter is reset to zero every 24 hours.
  • this maximum number can be predetermined, ie set on the device according to the invention.
  • the burner is in any case switched off and locked when the supply / boiler temperature reaches or exceeds the predeterminable second maximum supply / boiler temperature and the error signal of the temperature monitor has been blocked or is not present.
  • the device according to the invention works like a mechanical temperature limiter.
  • the device according to the invention advantageously has or uses a temperature sensor for detecting the flow temperature or the boiler temperature of a heating system, while the temperature monitor compares this measured temperature with the predeterminable first maximum flow / boiler temperature and shuts off the burner when it is reached or exceeded.
  • a temperature limiter in particular an electronic safety temperature limiter, compares the flow / boiler temperature with the predeterminable second maximum flow / boiler temperature which is higher than the predeterminable first maximum flow / boiler temperature and sends a shutdown signal to shut down and lock the burner to the automatic burner control when the flow / boiler temperature reaches or exceeds the predeterminable second maximum flow / boiler temperature and the temperature limiter additionally receives an error signal.
  • the temperature limiter then receives an error signal when the flow / boiler temperature reaches or exceeds the predeterminable first maximum flow / boiler temperature and the temperature monitor sends a status signal to the temperature limiter that signals no shutdown of the burner and / or the temperature limiter by means of a Burner valve signal detects an open burner valve.
  • the temperature limiter itself generates an error signal if it receives no burner valve signal or status signal of the temperature monitor or if none of these signals is applied to the temperature limiter, since the temperature limiter must then assume that either the signal transmission path or the signal generator itself is defective.
  • the temperature limiter shows the function of the mechanical safety temperature limiter, which shuts down and locks the burner when the second maximum flow / boiler temperature is exceeded.
  • the temperature limiter has a counter which counts the number of times when the predeterminable second maximum flow / boiler temperature has been reached or exceeded without the burner being locked. The temperature limiter then receives or generates no error signal if the counter does not reach or exceed a predeterminable number within a predeterminable time.
  • FIG. 1 schematically shows the view of a heating system with heater 14, which has a boiler 16 and a burner 15, which is supplied via a fuel line 17 with fuel.
  • the heated heating water is pumped via a pump (not shown) in a flow line 11 to a heat exchanger 13 and returned from there via a return line 12 to the heater 14, where it is heated again.
  • the flow temperature T VL of the heating water is measured, while the return temperature T RL of the water is also measured shortly before reaching the boiler 16.
  • FIG. 2 schematically shows the device according to the invention or the inventive method with automatic burner 1 and temperature limiter 2, which receives a burner valve signal 10 from the burner control unit 1. Furthermore, those of the in FIG. 1 not shown sensors measured temperatures, such as flow temperature T VL and return temperature T RL , passed to the temperature limiter 2 for plausibility check. Furthermore, the device according to the invention or the method according to the invention comprises a controller 4, which sends a heat request signal 6 to the burner control unit 1. For example, the controller 4 is a 2 .- / modulation controller.
  • the controller 4 sends a corresponding heating control flow temperature setpoint T VLsoll to the temperature limiter 2, which in turn checks the known signals for plausibility out and sends a tested flow temperature signal T VL2 to the controller 4 and the temperature monitor 5.
  • the temperature monitor 5 uses this checked flow temperature signal T VL2 to monitor the first predeterminable maximum flow / boiler temperature T VLmax1 and sends a guard signal 7 to the automatic burner 1, if the flow temperature T VL exceeds the first predeterminable maximum flow / boiler temperature T VLmax1 .
  • the temperature monitor 5 sends a status signal 9 to the temperature limiter 2, which, when the flow temperature T VL exceeds the second predeterminable maximum flow / boiler temperature T VLmax2 , tests both this status signal 9 and the burner valve signal 10 and, if both signals are present, no deactivation signal 8 for switching off and locking the burner 15 sends, since then a regular temperature monitor shutdown of the burner 15 is present.
  • the temperature limiter 2 is advantageously an electronic temperature limiter , the flow temperature (or boiler temperature), a return temperature T RL , a flow / boiler temperature setpoint T VLsoll , a status signal 9 of the temperature monitor 5 and, if necessary, the burner valve signal 10 for plausibility based on Checks plausibility criteria and the controller 4 and / or the temperature monitor 5 provides a tested flow temperature / boiler temperature T VL2 available.
  • the temperature limiter 2 sends the shutdown signal 8 for switching off and locking the burner 15 to the burner control unit 1, if one or more of the plausibility criteria are not met. After a shutdown of the Burner 15 is locked against automatic restart if the plausibility check provided a corresponding result.
  • the temperature limiter 2 thus monitors not only the individual temperature sensors 3 for short-circuit interruption or plausibility (for example, an unnaturally high difference between flow and return temperature), but also the electronic temperature monitor 5. By monitoring the individual sensors 3 ensures that the controller 4 and the temperature monitor 5 always reliable readings are available.
  • An advantageous test method for testing the method according to the invention or the device for monitoring burners according to the invention is carried out by the successive switching off of different functions of the temperature limiter 2, so that each individual function can be tested separately.
  • Each function of the temperature limiter 2 can thus be achieved by blocking or switching off the other functions separately and, for example, by switching on corresponding values of the feed boiler temperature T VL , the return temperature T RL , the feed / boiler temperature setpoint T VLsoll , the status signal 9, the temperature monitor 5 and / or the burner valve signal 10 are checked for plausibility based on plausibility criteria.
  • the shutdown signal 8 is sent to shutdown and locking the burner 15 to the burner control unit 1 when the pre-definable second maximum flow / Boiler temperature T VLmax2 is reached or exceeded.
  • the switching limit ie the exceeding of the predeterminable second maximum flow / boiler temperature T VLmax2 can thus be tested.
  • the temperature limiter 2 can also be checked for its functionality, if appropriate functions are provided which turn off the burner 15 already below reaching the pre-definable second maximum flow / boiler temperature.
  • a bit pattern is defined for switching off and for the release of individual functions or functional parts of the temperature limiter 2.
  • individual functions can be activated or blocked.
  • An example of such a bit pattern is shown in the following table: Bit no. function attitude 0 TW shutdown 0 or 1 1 Exceeding temperature gradient 0 or 1 2 Too large delta T ( ⁇ STB) 0 or 1 3 Too large Delta-T ( ⁇ STB + 8k) 0 or 1 4 Too large Delta-T ( ⁇ STB + 16k) 0 or 1 5 Return temperature> Boiler / flow temperature 0 or 1 6 TW monitoring 0 or 1 7 free 0 or 1
  • the shutdown of the burner 15 upon reaching the pre- definable second maximum flow / boiler temperature T VLmax2 can not be blocked on the basis of the above table and is thus always active. Thus, if all the functions of the above-mentioned table are blocked, the burner 15 is locked when the predeterminable second maximum flow / boiler temperature is exceeded.

Abstract

The invention relates to a device and a method for monitoring burners using an automatic heating machine ( 1 ) for controlling or regulating the burner ( 15 ), and a temperature controller ( 5 ). At least the flow/boiler temperature (T?VL?) is detected and is compared with a predeterminable first maximum flow boiler temperature (T?VLmax1?) by means of the temperature controller ( 5 ). The burner ( 15 ) is switched off when the flow/boiler temperature (T?VL?) reaches or exceeds the predeterminable first maximum flow/boiler temperature (T?VLmax1?), while the flow/boiler temperature (T?VL?) is compared with a predeterminable second maximum flow/boiler temperature (T?VLmax2?) which is higher than the predeterminable first maximum flow/boiler temperature (T?VLmax1?). The burner ( 15 ) is switched off and locked when the flow/boiler temperature (T?VL?) reaches or exceeds the predeterminable second maximum flow/boiler temperature (T?VLmax2?) and additionally when an error signal (F) is produced by the temperature controller ( 5 ). The error signal (F) is produced when the burner ( 15 ) has not been switched off correctly by the temperature controller ( 5 ) when the first maximum flow/boiler temperature (T?VLmax1?) has been achieved.

Description

Die vorliegende Erfindung betrifft ein Verfahren und eine Vorrichtung zur Überwachung von Brennern nach den Oberbegriffen der unabhängigen Patentansprüche 1 und 6.The present invention relates to a method and a device for monitoring burners according to the preambles of independent claims 1 and 6.

Es sind bereits Verfahren und Vorrichtungen zur Überwachung von Brennern mit einem Feuerungsautomaten zur Steuerung bzw. Regelung des Brenners bekannt, die in Heizsystemen aller Art beispielsweise bei Öl- und Gasfeuerungsanlagen zum Heizen von Gebäuden eingesetzt werden. Diese Verfahren und Vorrichtungen nutzen in aller Regel Regler zur Regelung des Feuerungsautomaten und Temperaturwächter zur Überwachung von maximalen Temperaturen im Heizsystem, wie beispielsweise dem Kessel oder der Vorlauftemperatur, um unsichere Betriebszustände, wie beispielsweise ein Überhitzen des Kessels, zu detektieren.There are already known methods and devices for monitoring burners with an automatic burner control or regulation of the burner, which are used in heating systems of all kinds, for example in oil and gas heating systems for heating buildings. These methods and devices usually use controller for controlling the automatic burner control and temperature monitor for monitoring of maximum temperatures in the heating system, such as the boiler or the flow temperature to detect unsafe operating conditions, such as overheating of the boiler.

In diesem Zusammenhang werden beispielsweise die Druckschriften EP-A-0825 385 und US-A-4470541 genannt, die ein Verfahren bzw. eine Vorrichtung zur Überwachung von Brennern nach dem Oberbegriff des Anspruchs 1 bzw. 6 offenbaren, wobei die Vorlauf-/Kesseltemperatur detektiert und mit einer vorbestimmbaren ersten maximalen Vorlauf-/Kesseltemperatur verglichen wird, und wobei der Brenner abgeschaltet wird, wenn er die Vorlauf-/Kesseltemperatur erreicht oder überschreitet.In this context, for example, the publications EP-A-0825385 and US-A-4470541 which disclose a method and apparatus for monitoring burners according to the preamble of claims 1 and 6, respectively, wherein the flow / boiler temperature is detected and compared with a predeterminable first maximum flow / boiler temperature, and wherein the burner is turned off when it reaches or exceeds the flow / boiler temperature.

Bei der sicherheitstechnischen Überwachung von Thermen oder Kesseln existiert bereits eine Sensorik, wie beispielsweise Kesselfühler, Vorlauffühler oder Rücklauffühler, die die Temperatur des Heizwassers im Kessel in der Vorlaufleitung oder in der Rücklaufleitung detektiert. Darüber hinaus haben bekannte Verfahren und Vorrichtungen zur Überwachung von Brennern weitere meist mechanische Begrenzungseinrichtungen, die eine maximale Temperatur detektieren und bei deren Überschreiten den Brenner abschalten und verriegeln. In diesem Falle muß entweder der Heizungsfachmann oder der Betreiber des Heizsystems feststellen, weshalb dieser Betriebszustand erreicht wurde, d.h. den Fehler detektieren, um dann die Verriegelung zu lösen und ein Wiedereinschalten des Brenners zu ermöglichen.In the safety monitoring of spas or boilers already exists a sensor, such as boiler sensor, flow sensor or return sensor, which detects the temperature of the heating water in the boiler in the flow line or in the return line. In addition, known methods and devices for monitoring burners have further mostly mechanical limiting devices, which detect a maximum temperature and turn off the burner when it is exceeded and lock. In this case, either the heating engineer or the operator of the heating system must determine why this operating condition has been reached, ie detect the error, then to release the lock and allow reconnection of the burner.

Weiterhin ist es bekannt, bei Regelgeräten, insbesondere aus Kostengründen, mechanische Bauteile durch elektronische Bauteile zu ersetzen und die elektronischen Bauteile mit Mehrfachfunktionen und entsprechenden Algorithmen auszurüsten.Furthermore, it is known in control devices, in particular for cost reasons, to replace mechanical components with electronic components and to equip the electronic components with multiple functions and corresponding algorithms.

Der bekannte Stand der Technik weist dabei den Nachteil auf, daß die bisher bekannten Vorrichtungen und Verfahren zur Überwachung von Brennern Sicherheitseinrichtungen aufweisen, die bei unsicheren Betriebszuständen, wie beispielsweise das Erreichen oder Überschreiten einer maximalen Temperatur, den Brenner abschalten und verriegeln, ohne daß Fallunterscheidungen getroffen werden können. Beispielsweise existieren Betriebszustände, die einem solchen unsicheren Betriebszustand ähnlich sind oder entsprechen, ohne daß es sich um einen Sicherheitsfall handelt. Zum Beispiel existieren sogenannte Nacherwärmungen nach einer Brennerabschaltung bei Thermen bzw. Kesseln, die einen kleinen Wasserinhalt aufweisen und die in diesem Falle bei Überschreiten der maximalen Temperatur nicht unbedingt verriegelt werden müßten. Weiterhin kann man mit den bekannten Vorrichtungen und Verfahren das dynamische Verhalten des Kessels bzw. der Therme in Verbindung mit den bereits existierenden Fühlern zur Messung unterschiedlicher Temperaturen oder Betriebszustände nicht überwachen. Es ist auch keine präventive Überwachung des Brenners möglich, da lediglich vordefinierte und feste Betriebszustände überwacht werden, nicht jedoch das Verhalten des Brenners vor oder nach diesen Betriebszuständen.The known state of the art has the disadvantage that the previously known devices and methods for monitoring burners have safety devices that switch off and lock the burner in uncertain operating conditions, such as reaching or exceeding a maximum temperature, without making case distinctions can be. For example, there are operating states that are similar or equivalent to such an unsafe operating state, without being a safety case. For example, there are so-called postheating after a burner shutdown in spas or boilers, which have a small water content and in this case would not necessarily be locked when the maximum temperature is exceeded. Furthermore, you can not monitor the dynamic behavior of the boiler or the spa in conjunction with the existing sensors for measuring different temperatures or operating conditions with the known devices and methods. There is also no preventive monitoring of the burner possible because only predefined and fixed operating conditions are monitored, but not the behavior of the burner before or after these operating conditions.

Der Erfindung liegt daher die Aufgabe zugrunde, die bekannten Verfahren und Vorrichtungen zur Überwachung von Brennern dahingehend zu verbessern, daß eine dynamische Überwachung von Brennern ermöglicht wird, die die Betriebszustände vor bzw. nach dem Erreichen eines unsicheren Betriebszustandes detektiert.The invention is therefore based on the object to improve the known methods and devices for monitoring of burners to the effect that a dynamic monitoring of burners is made possible, which detects the operating conditions before or after reaching an unsafe operating state.

Die Erfindung löst die ihr zugrunde liegende Aufgabe durch die kennzeichnenden Merkmale der unabhängigen Patentansprüche 1 und 6.The invention solves the underlying object by the characterizing features of the independent claims 1 and 6.

Vorteilhafte Varianten und Ausgestaltungen der Erfindung sind in den Unteransprüchen gekennzeichnet und beschrieben.Advantageous variants and embodiments of the invention are characterized and described in the subclaims.

Das erfindungsgemäße Verfahren zur Überwachung von Brennern weist einen Feuerungsautomaten zur Steuerung bzw. Regelung des Brenners und ggfs. einen Regler zur Regelung des Feuerungsautomaten auf sowie einen Temperaturwächter, wobei mindestens die Vorlauf-/Kesseltemperatur detektiert und mittels des Temperaturwächters mit einer vorbestimmbaren ersten maximalen Vorlauf-/Kesseltemperatur verglichen wird und wobei der Brenner abgeschaltet wird, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare erste maximale Vorlauf-/Kesseltemperatur erreicht oder überschreitet. Das erfindungsgemäße Verfahren zeichnet sich dadurch aus, dass die Vorlauf-/Kesseltemperatur mit einer vorbestimmbaren zweiten maximalen Vorlauf-/Kesseltemperatur verglichen wird, wobei die vorbestimmbare zweite maximale Vorlauf-/Kesseltemperatur höher ist als die vorbestimmbare erste maximale Vorlauf-/Kesseltemperatur, und dass der Brenner dann abgeschaltet und verriegelt wird, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare zweite maximale Vorlauf-/Kesseltemperatur erreicht oder überschreitet und zusätzlich ein Fehlersignal des Temperaturwächters erzeugt wird, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare erste maximale Vorlaufkesseltemperatur erreicht oder überschreitet und ein Statussignal des Temperaturwächters keine Abschaltung des Brenners signalisiert oder kein Statussignal des Temperaturwächters vorliegt. In diesem Fall handelt es sich um ein Versagen des Temperaturwächters, d.h. es hat keine Abschaltung des Brenners stattgefunden, obwohl die erste maximale Vorlauf-/Kesseltemperatur erreicht oder überschritten wurde.The inventive method for monitoring burners has an automatic burner control for controlling the burner and possibly a controller for controlling the automatic burner and a temperature monitor, wherein at least the flow / boiler temperature detected and by means of the temperature monitor with a predeterminable first maximum flow / Boiler temperature is compared and wherein the burner is turned off when the flow / boiler temperature reaches or exceeds the predeterminable first maximum flow / boiler temperature. The inventive method is characterized in that the flow / boiler temperature is compared with a predeterminable second maximum flow / boiler temperature, wherein the predeterminable second maximum flow / boiler temperature is higher than the predeterminable first maximum flow / boiler temperature, and that Burner is then shut down and locked when the flow / boiler temperature reaches or exceeds the predeterminable second maximum flow / boiler temperature and additionally an error signal of the temperature monitor is generated when the flow / boiler temperature reaches or exceeds the predeterminable first maximum flow temperature and a status signal the temperature monitor does not signalise burner shutdown or there is no status signal from the temperature monitor. In this case, it is a failure of the temperature monitor, i. there was no shutdown of the burner, although the first maximum flow / boiler temperature has been reached or exceeded.

Es erfolgt somit keine Verriegelung des Brenners, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare zweite maximale Vorlauf-/Kesseltemperatur, d.h. eine vorgebbare Sicherheitstemperatur erreicht, sondern es muß ein zusätzliches Fehlersignal vorliegen, das von bestimmten Betriebszuständen des Brenners wie folgt abhängt. Dabei ist zu berücksichtigen, daß sowohl die Vorlauf- als auch die Kesseltemperatur zur Überwachung des unsicheren Betriebszustandes "Überhitzen des Kessels bzw. der Therme" herangezogen werden kann. Das erfindungsgemäße Verfahren nutzt somit die bereits vorhandene Sensorik bei den bekannten Heizungssystemen und ersetzt somit die bisher üblichen mechanischen Sicherheitstemperaturbegrenzer, die meist mit einem Extra-Sensor die Temperatur im Vorlauf oder am Kessel überwacht haben.There is thus no locking of the burner when the flow / boiler temperature reaches the predeterminable second maximum flow / boiler temperature, ie a predefinable safety temperature, but there must be an additional error signal that depends on certain operating conditions of the burner as follows. It should be noted that both the flow and the boiler temperature for monitoring the unsafe operating condition "overheating of the boiler or the spa" can be used. The inventive method thus uses the existing sensors in the known heating systems and replaced Thus, the usual mechanical safety temperature limiter, which have usually monitored with an extra sensor, the temperature in the flow or on the boiler.

Das Fehlersignal des Temperaturwächters wird auch dann erzeugt, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare erste maximale Vorlauf-/Kesseltemperatur erreicht oder überschreitet und ein Brennerventilsignal ein offenes Brennerventil signalisiert oder kein Brennerventilsignal vorliegt. In diesem Falle ist auch die erste maximale Vorlauf-/Kesseltemperatur überschritten worden, ohne daß die Brennstoffzufuhr zum Brenner unterbrochen wurde. Auch in diesem Falle wird das Fehlersignal erzeugt, das zur Abschaltung und Verriegelung des Brenners führt.The error signal of the temperature monitor is also generated when the flow / boiler temperature, the predeterminable first maximum flow / boiler temperature reaches or exceeds and a burner valve signal signals an open burner valve or no burner valve signal is present. In this case, the first maximum flow / boiler temperature has been exceeded without the fuel supply to the burner has been interrupted. Also in this case, the error signal is generated, which leads to the shutdown and locking of the burner.

Gemäß der vorliegenden Erfindung wird der Brenner daher dann nicht verriegelt, wenn zwar die zweite maximale Vorlauf-/Kesseltemperatur überschritten wird, jedoch der Temperaturwächter eine reguläre Brennerabschaltung "meldet". Diese reguläre Brennerabschaltung liegt dann vor, wenn die erste maximale Vorlauf-/Kesseltemperatur erreicht oder überschritten wurde und der Temperaturwächter ein Statussignal meldet, das das Senden eines "AUS"-Signals an den Feuerungsautomat bestätigt und wenn ein Brennerventilsignal das Schließen bzw. den geschlossenen Zustand des Brennstoffventils signalisiert.Therefore, according to the present invention, the burner is not locked when the second maximum supply / boiler temperature is exceeded, but the temperature monitor "logs" a regular burner shutdown. This regular burner shutdown occurs when the first maximum supply / boiler temperature has been reached or exceeded and the temperature monitor signals a status signal that confirms sending an "OFF" signal to the burner control and if a burner valve signal is closing or closing of the fuel valve signals.

Ein solches Erreichen der zweiten maximalen Vorlauf-/Kesseltemperatur bei abgeschaltetem Brenner nennt man Nacherwärmung. Diese Nacherwärmung ist zunächst kein kritischer Betriebszustand, da diese durch keinen regelungstechnischen Fehler, sondern durch ungünstige Betriebsbedingungen oder Betriebszustände hervorgerufen wird. Um festzustellen, ob diese Nacherwärmung mehrmals am Tage am Brenner auftritt, wird nach einer vorteilhaften Variante der vorliegenden Erfindung ein spezieller Zähler für die Nacherwärmung hochgezählt, wenn die zweite maximale Vorlauf-/Kesseltemperatur durch eine Nacherwärmung erreicht würde. In diesem Fall wird das Fehlersignal des Temperaturwächters dann erzeugt, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare zweite maximale Vorlauf-/Kesseltemperatur mehr als eine vorbestimmbare Anzahl mal erreicht oder überschreitet, ohne daß eine Verriegelung des Brenners erfolgte. Wenn also die Nacherwärmung beispielsweise mehr als zehnmal am Tag auftritt, so scheint doch ein Fehler vorzuliegen (beispielsweise läuft die Pumpe nicht richtig) und demzufolge muß bei Überschreiten dieser Zählergrenze der Feuerungsautomat bzw. der Brenner doch verriegelt und ein entsprechender Fehlercode angezeigt werden.Such reaching the second maximum flow / boiler temperature when the burner is switched off is called reheating. This reheating is initially not a critical operating condition, as this is caused by any control errors, but by unfavorable operating conditions or operating conditions. In order to determine whether this reheating occurs several times a day at the burner, according to an advantageous variant of the present invention, a special counter for reheating is counted up if the second maximum flow / boiler temperature would be reached by reheating. In this case, the error signal of the temperature monitor is generated when the flow / boiler temperature reaches or exceeds the predeterminable second maximum flow / boiler temperature more than a pre-definable number of times, without the burner being locked. If, for example, the reheating occurs more than ten times a day, there still seems to be an error (for example, the pump is not running properly) and therefore, if this counter limit is exceeded, the automatic burner or burner must be locked and a corresponding error code displayed.

Gleichermaßen wird das Fehlersignal des Temperaturwächters jedoch nicht erzeugt, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare zweite maximale Vorlauf-/Kesseltemperatur die vorbestimmte Anzahl mal nicht innerhalb einer vorbestimmbaren Zeit erreicht oder überschreitet, ohne daß eine Verriegelung des Brenners erfolgte. Wird daher diese Maximalgrenze des Zählers (beispielsweise zehnmal am Tag) nicht überschritten, so wird der Zähler alle 24 Stunden auf Null zurückgesetzt. Mit Vorteil läßt sich diese maximale Anzahl vorbestimmen, d.h. an der erfindungsgemäßen Vorrichtung einstellen.Equally, however, the error signal of the temperature monitor is not generated when the flow / boiler temperature is the predeterminable second maximum flow / boiler temperature does not reach or exceed the predetermined number of times within a predeterminable time without the burner being locked. Therefore, if this maximum limit of the counter (for example, ten times a day) is not exceeded, the counter is reset to zero every 24 hours. Advantageously, this maximum number can be predetermined, ie set on the device according to the invention.

Natürlich wird der Brenner nach einer vorteilhaften Variante der vorliegenden Erfindung jedenfalls dann abgeschaltet und verriegelt, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare zweite maximale Vorlauf-/Kesseltemperatur erreicht oder überschreitet und das Fehlersignal des Temperaturwächters gesperrt wurde oder nicht vorliegt. In diesem Falle arbeitet die erfindungsgemäße Vorrichtung wie ein mechanischer Temperaturbegrenzer.Of course, according to an advantageous variant of the present invention, the burner is in any case switched off and locked when the supply / boiler temperature reaches or exceeds the predeterminable second maximum supply / boiler temperature and the error signal of the temperature monitor has been blocked or is not present. In this case, the device according to the invention works like a mechanical temperature limiter.

Die erfindungsgemäße Vorrichtung hat bzw. nutzt mit Vorteil einen Temperatursensor zum Detektieren der Vorlauftemperatur oder der Kesseltemperatur eines Heizsystems, während der Temperaturwächter diese gemessene Temperatur mit der vorbestimmbaren ersten maximalen Vorlauf-/Kesseltemperatur vergleicht und den Brenner abschaltet, wenn diese erreicht oder überschritten wird.The device according to the invention advantageously has or uses a temperature sensor for detecting the flow temperature or the boiler temperature of a heating system, while the temperature monitor compares this measured temperature with the predeterminable first maximum flow / boiler temperature and shuts off the burner when it is reached or exceeded.

Gemäß der vorliegenden Erfindung vergleicht ein Temperaturbegrenzer, insbesondere ein elektronischer Sicherheitstemperaturbegrenzer, die Vorlauf-/Kesseltemperatur mit der vorbestimmbaren zweiten maximalen Vorlauf-/Kesseltemperatur, die höher ist als die vorbestimmbare erste maximale Vorlauf-/Kesseltemperatur und sendet ein Abschaltungssignal zur Abschaltung und Verriegelung des Brenners an den Feuerungsautomat, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare zweite maximale Vorlauf-/Kesseltemperatur erreicht oder überschreitet und der Temperaturbegrenzer zusätzlich ein Fehlersignal erhält.According to the present invention, a temperature limiter, in particular an electronic safety temperature limiter, compares the flow / boiler temperature with the predeterminable second maximum flow / boiler temperature which is higher than the predeterminable first maximum flow / boiler temperature and sends a shutdown signal to shut down and lock the burner to the automatic burner control when the flow / boiler temperature reaches or exceeds the predeterminable second maximum flow / boiler temperature and the temperature limiter additionally receives an error signal.

Wie oben bereits beschrieben, erhält der Temperaturbegrenzer dann ein Fehlersignal, wenn die Vorlauf-/Kesseltemperatur die vorbestimmbare erste maximale Vorlauf-/Kesseltemperatur erreicht oder überschreitet und der Temperaturwächter ein Statussignal an den Temperaturbegrenzer sendet, das keine Abschaltung des Brenners signalisiert und/oder der Temperaturbegrenzer mittels eines Brennerventilsignals ein offenes Brennerventil detektiert. Der Temperaturbegrenzer generiert selbst ein Fehlersignal, wenn er kein Brennerventilsignal oder kein Statussignal des Temperaturwächters erhält bzw. wenn keines dieser Signale am Temperaturbegrenzer anliegt, da der Temperaturbegrenzer dann davon ausgehen muß, daß entweder die Signalübertragungsstrecke oder der Signalgeber selbst defekt ist. Auch hier zeigt der Temperaturbegrenzer dann die Funktion des mechanischen Sicherheitstemperaturbegrenzers, der bei Überschreiten der zweiten maximalen Vorlauf-/Kesseltemperatur den Brenner abschaltet und verriegelt.As described above, the temperature limiter then receives an error signal when the flow / boiler temperature reaches or exceeds the predeterminable first maximum flow / boiler temperature and the temperature monitor sends a status signal to the temperature limiter that signals no shutdown of the burner and / or the temperature limiter by means of a Burner valve signal detects an open burner valve. The temperature limiter itself generates an error signal if it receives no burner valve signal or status signal of the temperature monitor or if none of these signals is applied to the temperature limiter, since the temperature limiter must then assume that either the signal transmission path or the signal generator itself is defective. Here, too, the temperature limiter shows the function of the mechanical safety temperature limiter, which shuts down and locks the burner when the second maximum flow / boiler temperature is exceeded.

Mit Vorteil weist der Temperaturbegrenzer einen Zähler auf, der die Anzahl des Erreichens oder Überschreitens der vorbestimmbaren zweiten maximalen Vorlauf-/Kesseltemperatur zählt, ohne daß eine Verriegelung des Brenners erfolgte. Der Temperaturbegrenzer erhält bzw. generiert dann kein Fehlersignal, wenn der Zähler nicht innerhalb einer vorbestimmbaren Zeit eine vorbestimmbare Zahl erreicht oder überschreitet.Advantageously, the temperature limiter has a counter which counts the number of times when the predeterminable second maximum flow / boiler temperature has been reached or exceeded without the burner being locked. The temperature limiter then receives or generates no error signal if the counter does not reach or exceed a predeterminable number within a predeterminable time.

Eine vorteilhafte Ausführungsform des erfindungsgemäßen Verfahrens bzw. der erfindungsgemäßen Vorrichtung wird anhand der Zeichnungen näher erläutert. Dabei zeigen:

Figur 1
die schematische Darstellung eines Heizsystems, und
Figur 2
die schematische Darstellung des erfindungsgemäßen Verfahrens bzw. der erfindungsgemäßen Vorrichtung
An advantageous embodiment of the method and the device according to the invention will be explained in more detail with reference to the drawings. Showing:
FIG. 1
the schematic representation of a heating system, and
FIG. 2
the schematic representation of the method according to the invention or the device according to the invention

Figur 1 zeigt schematisch die Ansicht eines Heizsystems mit Heizung 14, die einen Kessel 16 und einen Brenner 15 aufweist, der über eine Brennstoffleitung 17 mit Brennstoff versorgt wird. Das erhitzte Heizwasser wird über eine Pumpe (nicht dargestellt) in eine Vorlaufleitung 11 zu einem Wärmetauscher 13 gepumpt und von dort über eine Rücklaufleitung 12 zur Heizung 14 zurückgeleitet, wo es erneut aufgeheizt wird. Nach Verlassen des Kessels 16 wird die Vorlauftemperatur TVL des Heizwassers gemessen, während die Rücklauftemperatur TRL des Wassers kurz vor Erreichen des Kessels 16 ebenfalls gemessen wird. FIG. 1 schematically shows the view of a heating system with heater 14, which has a boiler 16 and a burner 15, which is supplied via a fuel line 17 with fuel. The heated heating water is pumped via a pump (not shown) in a flow line 11 to a heat exchanger 13 and returned from there via a return line 12 to the heater 14, where it is heated again. After leaving the boiler 16, the flow temperature T VL of the heating water is measured, while the return temperature T RL of the water is also measured shortly before reaching the boiler 16.

Figur 2 zeigt schematisch die erfindungsgemäße Vorrichtung bzw. das erfindungsgemäße Verfahren mit Feuerungsautomaten 1 und Temperaturbegrenzer 2, der ein Brennerventilsignal 10 vom Feuerungsautomaten 1 erhält. Weiterhin werden die von den in Figur 1 nicht dargestellten Sensoren gemessenen Temperaturen, wie Vorlauftemperatur TVL und Rücklauftemperatur TRL,an den Temperaturbegrenzer 2 zur Plausibilitätsprüfung geleitet. Ferner umfaßt die erfindungsgemäße Vorrichtung bzw. das erfindungsgemäße Verfahren einen Regler 4, der ein Wärmeanforderungssignal 6 an den Feuerungsautomaten 1 sendet. Beispielsweise handelt es sich bei dem Regler 4 um einen 2.-/Modulationsregler. Der Regler 4 sendet einen der Heizungsregelung entsprechenden Vorlauftemperatur-Sollwert TVLsoll an den Temperaturbegrenzer 2, der wiederum die ihm bekannten Signale auf Plausibilität hin überprüft und ein geprüftes Vorlauftemperatursignal TVL2 an den Regler 4 und an den Temperaturwächter 5 sendet. Der Temperaturwächter 5 nutzt dieses geprüfte Vorlauftemperatursignal TVL2 zur Überwachung der ersten vorbestimmbaren maximalen Vorlauf-/Kesseltemperatur TVLmax1 und sendet ein Wächtersignal 7 an den Feuerungsautomat 1, falls die Vorlauftemperatur TVL die erste vorbestimmbare maximale Vorlauf-/Kesseltemperatur TVLmax1 überschreitet. Gleichzeitig sendet der Temperaturwächter 5 ein Statussignal 9 an den Temperaturbegrenzer 2, der dann, wenn die Vorlauftemperatur TVL die zweite vorbestimmbare maximale Vorlauf-/Kesseltemperatur TVLmax2 überschreitet, sowohl dieses Statussignal 9 als auch das Brennerventilsignal 10 testet und bei Vorliegen beider Signale kein Abschaltungssignal 8 zum Abschalten und Verriegeln des Brenners 15 sendet, da dann eine reguläre Temperaturwächterabschaltung des Brenners 15 vorliegt. FIG. 2 schematically shows the device according to the invention or the inventive method with automatic burner 1 and temperature limiter 2, which receives a burner valve signal 10 from the burner control unit 1. Furthermore, those of the in FIG. 1 not shown sensors measured temperatures, such as flow temperature T VL and return temperature T RL , passed to the temperature limiter 2 for plausibility check. Furthermore, the device according to the invention or the method according to the invention comprises a controller 4, which sends a heat request signal 6 to the burner control unit 1. For example, the controller 4 is a 2 .- / modulation controller. The controller 4 sends a corresponding heating control flow temperature setpoint T VLsoll to the temperature limiter 2, which in turn checks the known signals for plausibility out and sends a tested flow temperature signal T VL2 to the controller 4 and the temperature monitor 5. The temperature monitor 5 uses this checked flow temperature signal T VL2 to monitor the first predeterminable maximum flow / boiler temperature T VLmax1 and sends a guard signal 7 to the automatic burner 1, if the flow temperature T VL exceeds the first predeterminable maximum flow / boiler temperature T VLmax1 . At the same time, the temperature monitor 5 sends a status signal 9 to the temperature limiter 2, which, when the flow temperature T VL exceeds the second predeterminable maximum flow / boiler temperature T VLmax2 , tests both this status signal 9 and the burner valve signal 10 and, if both signals are present, no deactivation signal 8 for switching off and locking the burner 15 sends, since then a regular temperature monitor shutdown of the burner 15 is present.

Der Temperaturbegrenzer 2 ist mit Vorteil ein elektronischer Temperaturbegrenzer, der die Vorlauftemperatur (bzw. Kesseltemperatur), eine Rücklauftemperatur TRL, einen Vorlauf-/Kesseltemperatur-Sollwert TVLsoll, ein Statussignal 9 des Temperaturwächters 5 und ggfs. das Brennerventilsignal 10 auf Plausibilität anhand von Plausibilitätskriterien prüft und dem Regler 4 und/oder dem Temperaturwächter 5 eine geprüfte Vorlauf-/Kesseltemperatur TVL2 zur Verfügung stellt.The temperature limiter 2 is advantageously an electronic temperature limiter , the flow temperature (or boiler temperature), a return temperature T RL , a flow / boiler temperature setpoint T VLsoll , a status signal 9 of the temperature monitor 5 and, if necessary, the burner valve signal 10 for plausibility based on Checks plausibility criteria and the controller 4 and / or the temperature monitor 5 provides a tested flow temperature / boiler temperature T VL2 available.

Der Temperaturbegrenzer 2 sendet das Abschaltungssignal 8 zur Abschaltung und Verriegelung des Brenners 15 an den Feuerungsautomaten 1, wenn eine oder mehrere der Plausibilitätskriterien nicht erfüllt sind. Nach einer Abschaltung des Brenners 15 wird dieser gegen ein selbsttätiges Wiederanlaufen verriegelt, wenn die Plausibilitätsprüfung ein entsprechendes Ergebnis lieferte.The temperature limiter 2 sends the shutdown signal 8 for switching off and locking the burner 15 to the burner control unit 1, if one or more of the plausibility criteria are not met. After a shutdown of the Burner 15 is locked against automatic restart if the plausibility check provided a corresponding result.

Durch das erfindungsgemäße Verfahren bzw. durch die erfindungsgemäße Vorrichtung wird ein sicherer und zuverlässiger Betrieb des Brenners 15 erreicht, ohne daß unnötige Abschaltungen und Verriegelungen erfolgen. Andererseits wird der Brenner 15 jedoch bei kritischen Betriebs- und Gefahrenzuständen sicher abgeschaltet und verriegelt. Der Temperaturbegrenzer 2 überwacht somit nicht nur die einzelnen Temperatursensoren 3 auf Kurzschlußunterbrechung oder Plausibilität (beispielsweise eine unnatürlich hohe Differenz zwischen Vorlauf- und Rücklauftemperatur), sondern auch den elektronischen Temperaturwächter 5. Durch die Überwachung der einzelnen Sensoren 3 wird sichergestellt, daß dem Regler 4 und dem Temperaturwächter 5 stets verläßliche Meßwerte zur Verfügung stehen.By the method according to the invention or by the device according to the invention a safe and reliable operation of the burner 15 is achieved without unnecessary shutdowns and locks. On the other hand, the burner 15 is safely switched off and locked in critical operating and hazardous conditions. The temperature limiter 2 thus monitors not only the individual temperature sensors 3 for short-circuit interruption or plausibility (for example, an unnaturally high difference between flow and return temperature), but also the electronic temperature monitor 5. By monitoring the individual sensors 3 ensures that the controller 4 and the temperature monitor 5 always reliable readings are available.

Ein vorteilhaftes Testverfahren zum Testen des erfindungsgemäßen Verfahrens bzw. der erfindungsgemäßen Vorrichtung zur Überwachung von Brennern erfolgt durch das sukzessive Abschalten verschiedener Funktionen des Temperaturbegrenzers 2, so daß jede einzelne Funktion separat geprüft werden kann.An advantageous test method for testing the method according to the invention or the device for monitoring burners according to the invention is carried out by the successive switching off of different functions of the temperature limiter 2, so that each individual function can be tested separately.

Jede Funktion des Temperaturbegrenzers 2 kann somit durch Sperren oder Abschalten der anderen Funktionen separat und beispielweise durch Aufschalten entsprechender Werte der Vorlaufkesseltemperatur TVL, der Rücklauftemperatur TRL, des Vorlauf-/Kesseltemperatur-Sollwerts TVLsoll, des Statussignals 9, des Temperaturwächters 5 und/oder des Brennerventilsignals 10 auf Plausibilität anhand von Plausibilitätskriterien geprüft werden.Each function of the temperature limiter 2 can thus be achieved by blocking or switching off the other functions separately and, for example, by switching on corresponding values of the feed boiler temperature T VL , the return temperature T RL , the feed / boiler temperature setpoint T VLsoll , the status signal 9, the temperature monitor 5 and / or the burner valve signal 10 are checked for plausibility based on plausibility criteria.

Durch Sperren aller Funktionen des Temperaturbegrenzers 2, d.h. wenn weder die Temperatursensoren 3 noch der Regler 4 oder der Temperaturwächter 5 geprüft werden, wird das Abschaltungssignal 8 zur Abschaltung und Verriegelung des Brenners 15 an den Feuerungsautomaten 1 dann gesendet, wenn die vorbestimmbare zweite maximale Vorlauf-/Kesseltemperatur TVLmax2 erreicht oder überschritten wird. Anhand einer Sperrung sämtlicher Funktionen des Temperaturbegrenzers 2 läßt sich somit die Schaltgrenze, d.h. das Überschreiten der vorbestimmbaren zweiten maximalen Vorlauf-/Kesseltemperatur TVLmax2 testen.By blocking all functions of the temperature limiter 2, that is, if neither the temperature sensors 3 nor the controller 4 or the temperature monitor 5 are checked, the shutdown signal 8 is sent to shutdown and locking the burner 15 to the burner control unit 1 when the pre-definable second maximum flow / Boiler temperature T VLmax2 is reached or exceeded. On the basis of a blocking of all functions of the temperature limiter 2, the switching limit, ie the exceeding of the predeterminable second maximum flow / boiler temperature T VLmax2 can thus be tested.

Somit läßt sich der Temperaturbegrenzer 2 auch dann auf seine Funktionalität hin prüfen, wenn entsprechende Funktionen vorgesehen werden, die den Brenner 15 bereits unterhalb des Erreichens der vorbestimmbaren zweiten maximalen Vorlauf-/Kesseltemperatur abschalten.Thus, the temperature limiter 2 can also be checked for its functionality, if appropriate functions are provided which turn off the burner 15 already below reaching the pre-definable second maximum flow / boiler temperature.

Mit Vorteil wird für das Abschalten und für das Freigeben von einzelnen Funktionen bzw. Funktionsteilen des Temperaturbegrenzers 2 ein Bitmuster definiert. Durch das Setzen von "0" und "1" können einzelne Funktionen aktiviert oder gesperrt werden. Ein Beispiel für ein solches Bitmuster ist in der folgenden Tabelle dargestellt: Bit-Nr. Funktion Einstellung 0 TW-Abschaltung 0 oder 1 1 Überschreitung Temperaturgradient 0 oder 1 2 Zu großes Delta-T (ΔϑSTB) 0 oder 1 3 Zu großes Delta-T (ΔϑSTB + 8k) 0 oder 1 4 Zu großes Delta-T (ΔϑSTB + 16k) 0 oder 1 5 Rücklauftemperatur > Kessel-/Vorlauftemperatur 0 oder 1 6 TW-Überwachung 0 oder 1 7 frei 0 oder 1 Advantageously, a bit pattern is defined for switching off and for the release of individual functions or functional parts of the temperature limiter 2. By setting "0" and "1", individual functions can be activated or blocked. An example of such a bit pattern is shown in the following table: Bit no. function attitude 0 TW shutdown 0 or 1 1 Exceeding temperature gradient 0 or 1 2 Too large delta T (Δθ STB) 0 or 1 3 Too large Delta-T (Δθ STB + 8k) 0 or 1 4 Too large Delta-T (Δθ STB + 16k) 0 or 1 5 Return temperature> Boiler / flow temperature 0 or 1 6 TW monitoring 0 or 1 7 free 0 or 1

Die Abschaltung des Brenners 15 beim Erreichen der vorbestimmbaren zweiten maximalen Vorlauf-/Kesseltemperatur TVLmax2 läßt sich anhand der oben angegebenen Tabelle nicht sperren und ist somit immer aktiv. Sind somit sämtliche Funktionen der oben angegebenen Tabelle gesperrt, so wird bei Überschreiten der vorbestimmbaren zweiten maximalen Vorlauf-/Kesseltemperatur der Brenner 15 verriegelt.The shutdown of the burner 15 upon reaching the pre- definable second maximum flow / boiler temperature T VLmax2 can not be blocked on the basis of the above table and is thus always active. Thus, if all the functions of the above-mentioned table are blocked, the burner 15 is locked when the predeterminable second maximum flow / boiler temperature is exceeded.

Mit der vorliegenden Erfindung ist somit eine dynamische Überwachung des Verhaltens von Kesseln 16 oder Thermen in Verbindung mit den verschiedenen Sensoren 3 möglich, so daß der Betrieb des Brenners 15 besser vorgesteuert und ggfs. auch früher abgeschaltet werden kann.With the present invention, therefore, a dynamic monitoring of the behavior of boilers 16 or spas in conjunction with the various sensors 3 is possible, so that the operation of the burner 15 can be better pre-controlled and, if necessary, also switched off earlier.

Claims (12)

  1. Method for monitoring burners with an automatic burner control (1) for controlling and/or regulating the burner (15), optionally a regulator (4) for regulating the automatic burner control (1) and a temperature monitor (5), at least the flow/boiler temperature (TVL) being detected and compared by means of the temperature monitor (5) with a predefinable first maximum flow/boiler temperature (TVLmax1), and the burner (15) being switched off if the flow/boiler temperature (TVL) reaches or exceeds the predefinable first maximum flow/boiler temperature (TVLmax1), characterized in that the flow/boiler temperature (TVL) is compared with a predefinable second maximum flow/boiler temperature (TVLmax2), the predefinable second maximum flow/boiler temperature (TVLmax2) is higher than the predefinable first maximum flow/boiler temperature (TVLmax1), and the burner (15) is switched off and locked if the flow/boiler temperature (TVL) reaches or exceeds the predefinable second maximum flow/boiler temperature (TVLmax2) and additionally an error signal (F) of the temperature monitor (5) is produced if the flow/boiler temperature (TVL) reaches or exceeds the predefinable first maximum flow/boiler temperature (TVLmax1) and a status signal (9) of the temperature monitor (5) signals no switching-off of the burner (15) or there is no status signal (9) of the temperature monitor (5).
  2. Method according to claim 1, characterized in that the error signal (F) of the temperature monitor (5) is produced if the flow/boiler temperature (TVL) reaches or exceeds the predefinable first maximum flow/boiler temperature (TVLmax1) and a burner valve signal (10) signals an open burner valve or there is no burner valve signal (10).
  3. Method according to one of the proceeding claims, characterized in that the error signal (F) of the temperature monitor (5) is produced if the flow/boiler temperature (TVL) reaches or exceeds the predefinable second maximum flow/boiler temperature (TVLmax2) more than a predefinable number of times without a locking of the burner having taken place.
  4. Method according to claim 3, characterized in that the error signal (F) of the temperature monitor (5) is not produced if the flow/boiler temperature (TVL) does not reach or exceed the predefinable second maximum flow/boiler temperature (TVLmax2) the predefinable number of times within a predefinable period of time, without a locking of the burner having taken place.
  5. Method according to one of the preceding claims, characterized in that the burner (15) is switched off and locked if the flow/boiler temperature (TVL) reaches or exceeds the predefinable second maximum flow/boiler temperature (TVLmax2) and the error signal (F) of the temperature monitor (5) was blocked or is not present.
  6. Device for monitoring burners with an automatic burner control (1) for controlling and/or regulating the burner (15), optionally a regulator (4) for regulating the automatic burner control (1), at least one sensor (3) for detecting a flow/boiler temperature (TVL) and a temperature monitor (5) which compares the flow/boiler temperature (TVL) with a predefinable first maximum flow/boiler temperature (TVLmax1) and which switches off the burner (15) if the flow/boiler temperature (TVL) reaches or exceeds the predefinable first maximum flow/boiler temperature (TVLmax1), characterized in that a temperature limiter (2) compares the flow/boiler temperature (TVL) with a predefinable second maximum flow/boiler temperature (TVLmax2), the predefinable second maximum flow/boiler temperature (TVLmax2) being higher than the predefinable first maximum flow/boiler temperature (TVLmax1), and in that the temperature limiter (2) sends a switch-off signal (8) to switch off and lock the burner (15) to the automatic burner control (1) if the flow/boiler temperature (TVL) reaches or exceeds the predefinable second maximum flow/boiler temperature (TVLmax2) and the temperature limiter (2) additionally receives an error signal (F) if the flow/boiler temperature (TVL) reaches or exceeds the predefinable first maximum flow/boiler temperature (TVLmax1) and the temperature monitor (5) sends a status signal (9) to the temperature limiter (2) which signals no switching-off of the burner (15).
  7. Device according to claim 6, characterized in that the temperature limiter (2) receives an error signal (F) if the flow/boiler temperature (TVL) reaches or exceeds the predefinable first maximum flow/boiler temperature (TVLmax1) and the temperature limiter (2) detects an open burner valve by means of a burner valve signal (10).
  8. Device according to claim 6 or 7, characterized in that the temperature limiter (2) generates an error signal (F) if there is no burner valve signal (10) or no status signal (9) of the temperature monitor (5).
  9. Device according to one of claims 6-8, characterized in that the temperature limiter (2) has a counter which counts the number of times the predefinable second maximum flow/boiler temperature (TVLmax2) is reached or exceeded without a locking of the burner having taken place.
  10. Device according to claim 9, characterized in that the temperature limiter (2) receives or generates no error signal (F) if the counter does not reach or exceed a predefinable number within a predefinable period of time.
  11. Device according to one of claims 6-10, characterized in that the temperature limiter (2) is an electronic temperature limiter (2) which checks the flow/boiler temperature (TVL), a return temperature (TRL), a flow/boiler temperature reference value (TVLsoll), a status signal (9) of the temperature monitor (5) and optionally the burner valve signal (10) for plausibility using plausibility criteria, and provides the regulator (4) and/or the temperature monitor (5) with a checked flow/boiler temperature (TVL2).
  12. Device according to claim 11, characterized in that the temperature limiter (2) sends the switch-off signal (8) to switch off and lock the burner (15) to the automatic burner control (1) if one or more of the plausibility criteria has not been fulfilled.
EP02702678A 2001-03-26 2002-03-14 Method and device for monitoring burners Expired - Lifetime EP1373801B1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE10114823A DE10114823A1 (en) 2001-03-26 2001-03-26 Method and device for monitoring burners
DE10114823 2001-03-26
PCT/IB2002/000788 WO2002077529A1 (en) 2001-03-26 2002-03-14 Method and device for monitoring burners

Publications (2)

Publication Number Publication Date
EP1373801A1 EP1373801A1 (en) 2004-01-02
EP1373801B1 true EP1373801B1 (en) 2008-05-07

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Application Number Title Priority Date Filing Date
EP02702678A Expired - Lifetime EP1373801B1 (en) 2001-03-26 2002-03-14 Method and device for monitoring burners

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US (1) US7090140B2 (en)
EP (1) EP1373801B1 (en)
AT (1) ATE394636T1 (en)
DE (2) DE10114823A1 (en)
WO (1) WO2002077529A1 (en)

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DE50308404D1 (en) * 2003-03-24 2007-11-29 Siemens Schweiz Ag Device for temperature control / limitation for a heat generation plant
US7841198B2 (en) * 2006-07-18 2010-11-30 Whirpool Corporation Ice maker with water quantity sensing
US7891572B1 (en) 2007-04-05 2011-02-22 C. Cowles & Company Temperature and low water monitoring for boiler systems
US8490886B2 (en) * 2007-06-28 2013-07-23 Westcast, Inc. Modulating boiler system
JP2011208921A (en) * 2010-03-30 2011-10-20 Yamatake Corp Combustion control device
US10508807B2 (en) * 2014-05-02 2019-12-17 Air Products And Chemicals, Inc. Remote burner monitoring system and method

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US4470541A (en) * 1983-03-30 1984-09-11 Teledyne Industries, Inc. Control system for low mass hydronic boilers
DE3923773A1 (en) 1988-07-20 1990-03-01 Vaillant Joh Gmbh & Co Microcomputer control for gas-fired central heating boiler
AT395776B (en) * 1989-12-12 1993-03-25 Vaillant Gmbh METHOD AND DEVICE FOR MONITORING THE HEATING WATER CIRCUIT IN A GAS WATER HEATER
US4951870A (en) * 1990-02-21 1990-08-28 Carrier Corporation Overtemperature control
JPH06288538A (en) 1992-06-30 1994-10-11 Noritz Corp Water heating apparatus for hot water heater
US5372120A (en) * 1993-07-23 1994-12-13 Swilik, Jr.; Robert C. Safety circuit for furnace
DE19542088C1 (en) * 1995-11-11 1996-10-24 Bosch Gmbh Robert Temp. control of gas-heated water boilers
DE19633317A1 (en) 1996-08-19 1998-02-26 Kromschroeder Ag G Control arrangement for a burner
AT406519B (en) * 1997-04-28 2000-06-26 Vaillant Gmbh WATER HEATER
AT404509B (en) * 1997-04-28 1998-12-28 Vaillant Gmbh WATER HEATER WITH A CONTROL UNIT WITH FLAME MONITORING
US6059195A (en) * 1998-01-23 2000-05-09 Tridelta Industries, Inc. Integrated appliance control system

Also Published As

Publication number Publication date
DE10114823A1 (en) 2002-10-10
EP1373801A1 (en) 2004-01-02
US7090140B2 (en) 2006-08-15
DE50212225D1 (en) 2008-06-19
ATE394636T1 (en) 2008-05-15
WO2002077529A1 (en) 2002-10-03
US20040112970A1 (en) 2004-06-17

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